Twitpocalypse Now'ish -- Is Your iPhone Twitter Client Safe?

similar to the Y2K bug. The unique identifier associated to each tweet has now exceeded 2,147,483,6471 [...] For some of your favorite third-party Twitter services not designed to handle such a case, the sequence will suddenly turn into negative numbers. At this point, they are very likely to malfunction or crash.

Here's how it may be affecting some of your favorite iPhone Twitter clients:

Tweetie: No official word, but users indicated it's experiencing pain in searches.

Twitterrific: Currently experiencing problems after a preventative update wasn't enough to avoid the great doom. Second update in the works per Icon Factory.

I use Tweetie, Twitterfon and Twitterific. Twitterfon is the only one unaffected while twitterific is pretty much useless to me. Tweetie has errors on Search and Nearby, but not on the tweets themselves.